Window-spring.



J. H-AGERTY.

4 WINDOW SPBING.- APPLICATION FILED DBO. 21, 1908.

2 SHEETS-SHEET 1.

SO connection. with the accompanying drawings JAMES AGERTY, or soon TowNsmP', ALLEGHENY COUNTY, PENNSYLVANIA.

WINDOW-SPRING.

To all whom it may concern: v l 3*e' it known that, I, James Haoint'rr, a citizen of the United States, residing in Scott township, in the county of Allegheny and State of Pennsylvania, have invented certain new andzusefu'l Improvements in Window-Sprin s; and'I do eclare the following to be a ll olear, and exact description' of the invention, such as Willienable others ,skilled in the art to. which it appertain's to make and use'the same,- reference being had to the accompanying drawings,

and to the figures I of reference marked thereon, which form a part of this specification. M a

*My invention relates to that class of window springs asemployed for, operating signals arranged in an electric circuit, When thedivind'ow's to which the same is applied are a l, usted, or when the spring is tampered with, thereby giving not-ice that someone is attempting to gain access to the room or building. I

The invention is adapted for either open or closed circuits, simplein construction, of few parts and does not necessitate defa ing'of the frame'in its application thereto. 1

' The nature and characteristic features of my invention will be more fully understood. fro'mthe following specification, taken in I \vhich form a part thereof, and inwhich:

Figure I is a front elevation of my improved spring. Fig. II is asimilar View thereof, with one side of the casing removed. Fig. III is a front elevation. of the same, partly in transverse: section and with the operating lever removed. Ilig. IV isa side elevation of the device having the side of the casing removed. Fig. V is an elevated portion of a wi-ndow and attending frame, showing the application of the device thereto. Fig. VI is a diagram illustrating its application to a closed circuit alarmsystem, and Fig. Vli ,is a like View showing its application to an open alarm circuit; similar detail parts of the device being designated by like numerals in all yiews Where they occur.

The invention comprises in its structure, a casing formed of two parts 1 and 2, secured to one another by screws 3 and 3 and adapted to be connected to the inner edge of the window-frame by screws andfi, theupper face portion of said casing being preferably inclined.

to the window sash by'a screw v13.

, the window-sash the roller 12 will Pivot-ally secured within and projecting through an opening in the inclined face of Specification of Letters Patent.-. Patented Dec. 1-&, 1909. I Application filed member 21, 1905. Serial no. 468,429.

said casing is an inclinedly disposed lever *5,

held under tension b aspring 6 at its rear inSiii-l ate contact plate 7, Whiclrplate', when the leper carryingthe sam'e isin its abnormalposition, is adapted to engage withthe uppeii ends of the leaf spring contact memend and dprovided at its forward end with an 8 and 9 which are securely mounted;

u '1 oil a block of insulating material 10. One

o the eh'ontact members, preferably that designated as 9, is provided with an exten-' sion 9 which is turned down over the edge of 'the insulation block and disposed toward *th opposite end of the same andnormally he (I iireng'agement with another contact member 11, carried-by said insulating block, by means of the aforesaid 'casing portion 1, a strip of insulating material being inserted between.--

To the window sash isattached a member to engageand normally depress the lever and hold its attending contact plate ()lltfof engagement with the aforesaid contact members 8 and 9, which member is ireferablyj in place in the form of roller 12 securet In ractice, Where the device is en iployed for c osed c1rcu1t. work, reference is to be had to Fig. VI, in which instance the contac'ts 8, 9 and 11' are connected in 'a-closed electric circuit with a'resistance" coil 15,

gravity batteries 16 and galvanometor 17, by means of Wires 18. Associated withthis" closed circuit is a signal circuit, embracing a bell 19 and battery 20, one end'of the circuit wire 21 being connected to the pointer of the galvanometer, the end of said pointer being normally disposed between the contacts 21 connected to the circuit wire. In 1 this case,,it is to be renlen'ibcrcd that the roller on the window sash is normally n1ain-" tainiug thecontact plate 7 .out of engagement with the contacts 8 and 9, by depressing the lever carrying the same, and that the extension 9 and contact llareheld in normal engagemeht by the pressure of the de 'tachable portion of the casing acting thereon. Now, should any one attempt to adj ust pass off the lever 5, causing the plate 7 to engage the contacts 8 and 9, thus short circuiting the current through the galvanometer, causing its pointer to deflect and engage with one of thecontacts 21, thus closing the CIICHlt and ringing the bell. Again, should the spring be tampered with, by removinq the zasing portion 1, the contact 9 would disengage Wlth'thtlfi 11 as shown at Fig. IL) opening the gravity circuit and causing the pointer to deflect in the opposite l-ireetion i from that previously described, causing the l same to engage with the other contact 21 l l l l closing the circuit of and ringing the bell.

When the spring is to be employed for open circuit work, as at Fig. Vll. the extension 9 and genteet 11' are normally sepathcreupon, the contacts 8 and 9 being connected in circuit with a. hell 25 and a battery 26 by wires 27 and the contact 11 with the contact 8 by a wire 28. Should .an attempt be made to open the window the roller 12 I carried tl'iercby will pass off the lever causi l rated by the pressure of the casin section '1 I l l ing it to move and bring the plate 7 thereof in. contact with the members Sand 9, thus .closiugthe circuitand ringing the bell of contacts insulated from one another and the casing in the path of and adapted to engage the free end of the lever therebetween, a member carried by the face portion of the window sash i'iormally engaging withand retaining the lever in its depressed position, and a spring for placing tension iipon the lever and causing itto adjust itself to its abnormal position be, tween the contacts and retain engagement therewith when released by said member.

In a window spring, a casing carried by the window frame and provided with a removable portion, a lcver-extiaiding therein and normally held under tension in its dein said casing in the path of the free end of said lover, a separate contact uurmber res tained in normal relation with one of, the aforesaid contacts by the runovable portion of the casing, and a member *atricd by the window sash normally engaging with and retaining the saidlever in its depressed pol sition. i I i 3. In a window spring,a closed casing carried by the inner exposed surface of the Window frame alongside of the sash. a lover l pressed position. a pair of contacts arranged l pivotally arranged therein and annually \Vitnesses:

held in its depressed position, an insulated contact carried by said layer, a pair of con- BEST AVAILABLE-COPY tacts insulated from one another and the :a'sing arranged in said casing, a member carried by the window sash normally retaining said lever i its depressed position, and a spring for pacing tension on said lever and causing it to adjust itself to its abnormal position to make and maintain engagement of the contact carried by the lever wltlrthe pair of contacts when released by saidmcmher. r i

4-. In a window spring, a casing carried by the window frame and provided with a removable portion, a lever pivotally arranged therein and normally held under tension in its depressed position, a contact member insulatedly secured to the free end.

of said lever, a pair of contacts arranged in the path of the contact: carried by the said lever, a separate contact member retained in its normal relation with one of the pairof' contacts by the removable portion of the casing, and a men'iber carried by the wlndow sash normally engaging with and retaining the said lever in its depressed position. i

In a window spring, a closed casing carried by the inner exposed surface of the window frame alongside of the sash the face portion of said casing being inclined, a lever pivotally arranged within one end of said casing and extending lengthwise thereof and n'ojecting through its inclined face at & greater inclination and normally held in its depressed position, a pair of spaced contacts arranged 1n said casing and insulated. from one another and from an casing the free end of the lever being disposal therebetween, a roller carried by the face portion of the window sash normally engaginp with and retaining the lever in its depressor position. and a spring for placing tension on said lever and causing it to adjust itself to its abnormal position to make and maintain engagement of tb c'end of the. lever withthe pair of contacts roller. 1

in a window spring a raising carried by the window 't'ran and iirm ided with a rewhen reloased by said movable portion, an inclined spring actuated lever pivotally arranged in and piojecting from said casing. a pair of contact members f arranged therein and adapted to be engaged by the free endot' the lever to close a. circuitf" a separate contact therein retained in its nor-- mal relation with one of the pair of contacts by the removable portion of the 02181112,, and

a roller carried by the window sash to engage and operate said lever.

.In testimony whereof, I affix my signature, in presence of two witnesses. JAMES 'l-IAGERTY.

R. S. llainnson, D. B. (has. i 

